Comparison of methodologies for estimating enteric methane emission factors from sheep in smallholder systems in Africa: A case study from Ethiopia von Gurmu, Endale B., Ndung’u, Phyllis W., Wilkes, Andreas, Getahun, Daniel, Graham, Michael W., Leitner, Sonja M., Marquardt, Svenja, Mulat, Daniel G., Merbold, Lutz, Worku, Tigist, Gakige, Jesse K., Tadesse, Dereje, Bekele, Mekete, Arndt, Claudia

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